62 The Mosquitoes of Egypt, The Sudan and Abyssinia BY Fred. V. Theobald, M.A., Vice Principal of the S.E. Agricultural College ; Foreign Member of the Association of Economic Entomologists, Washington, D.C., U.SA. ; President of the Association of Economic Biologists of Britain, etc.

The following paper is mainly based on the material collected by Dr. Andrew Balfour, Director of the Wellcome Research Laboratories, Khartoum, and to some extent by Captain Lyle Cummins, R.A.M.C., Dr. Keatinge, Major Ronald Ross, C.B., late I.M.S., and others. Many of the notes are those sent me by Dr. Andrew Balfour.

The specimens collected by the Director were mostly taken during a trip up the Blue Kile to Roseires, up the White Kile to Regaf in the Lado Enclave and up the Sobat and its two branches the Baro and the Pibor in Abyssinian territory.

As one might expect the regions traversed by the Kile and its tributaries are very prolific in regards to this group of Diptera. This is especially noticeable along the course of the Blue and White Kiles, where in many parts the number of these pests is enormous. Kot many species are yet known from this region, but it is almost certain that very many more exist.

The chief pests seem to be in the genera Culex and Mansonia, and amongst the Anophelina we find abundance of a Cellia, C. pharcensis, Theobald, and a Myzomyia, M. funesta, Giles. A new Anopheles (A. wellcomei) closely related to Anopheles gigas, Giles, from India is described and a new Myzomyia also some other Anophelines of considerable interest. The collection made by Dr. Balfour also contained a new Uranotaenia (ZT. balfouri) and at least one new genus ('Etorleptiomyia), Two strange males occurred in the collection, one undoubtedly the male of my genus Mimomyia. The other I cannot place in spite of its marked palpal character. I have merely described it without referring it to any definite position, as it was in too damaged a condition to show scale structure. The great number of Mansonia uniformis, Theobald, was the most noticeable feature during Dr. Balfour s trip. For other localities vide Dr. Balfour’s list, which I have checked.

Many of the specimens showed the presence of a parasitic tick attached to them. When alive the parasite resembles a tiny preserved cherry, says Dr. Balfour. As a rule this parasite is attached to the under surface of the thorax and abdomen, but it was once found on the wing of an Anopheles. The colour varies in intensity.